New Mac Operating System 'Yosemite' Includes Updates for Safari Browser, iCloud Product

Apple Inc. did little to quell the clamor for new gadgets at its annual developers' conference, forgoing new hardware and focusing on under-the-hood updates to its main software platforms.

Apple's primary announcements at the closely watched conference were largely technical—new ways for apps to talk to each other and a new programming language to help developers create apps more easily. It also unveiled plans to make the iPhone a...